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在旱地中采用周年覆盖栽培技术 (秋覆膜 ) ,对汛期降水蒸发的抑制率可达 3 0 %～ 5 0 %,比春覆膜 (对照 )多保蓄 3 172mm/hm2 以上的降水 ;秋覆膜的垄与麦沟形成微型集雨区 ,降水易向沟内径流 ,可多聚水 15 0 0mm/hm2 以上 ,两者合计多蓄水 4672mm/hm2 以上。冬春两季 0～ 10cm地积温 ,垄上与垄底分别增加约 40 0℃和 2 0 0℃。土壤内各种微生物增加 0 .66～ 1.2倍 ,土壤总孔隙度提高 4.5 1%,速效N、P2 O5 、K2 O含量分别增加 5 .88%、2 4.69%、10 .3 1%。旱地冬小麦增产 2 5 .5 %～ 40 .3 %。
In the dry land, the annual cover cultivation technique (autumn mulch) was used to control precipitation and evaporation in the flood season up to 30% ~ 50% more than the spring mulching film (control), with more than 3 172mm / hm2 precipitation The covered ridge and the wheat ditch form a micro catchment area, and the precipitation is easy to run into the ditch. It can accumulate more than 150 mm / hm2 of water, and the total combined water content is 4672 mm / hm2 or more. Winter and spring 0 ~ 10cm in the plot temperature, ridge and ridge were increased by about 40 0 ℃ and 200 ℃. Soil microorganisms increased by 0.66 ~ 1.2 times, soil total porosity increased by 4.5 1%, available N, P2 O5, K2 O content increased by 5.88%, 2.69%, 10.31%. Dryland winter wheat yield 25.5% ~ 40.3%.